Dielectric relaxation behaviour in supercooled short-chain primary amines

This work presents the dielectric behaviour in the primary amines for the importance of NH₂ group it bears in the interaction of amino acids and proteins and their influence in the electric conduction process. Therefore, we have studied the dielectric properties for 1-propylamine, 1-butylamine and 1-pentylamine. Measurements were performed, between room temperature and -200°C, in the low frequency range. The isofrequency recordings of dispersion ε´ and absorption ε´´, for these three primary amines, show clearly the liquid-solid phase transitions and the effect of the aliphatic chain length